The top command is a Linux command that displays information about resource utilization for running processes and shows additional information for core utilization and memory. The top command provides a dynamic real-time view of the system, showing the processes that are consuming the most CPU, memory, and other resources. The top command also shows the total number of processes, the system load average, the uptime, and the CPU usage by user, system, and idle. The top command can be customized by using various options and interactive commands to change the display, sort the processes, filter the output, and kill processes.
The other commands are incorrect because:
B : vmstat is a Linux command that displays information about the virtual memory, CPU, disk, and system activity. It does not show information about individual processes or core utilization.
C : cptop is a Check Point command that displays information about the firewall kernel activity, such as the number of connections, packets, drops, and rejects. It does not show information about other processes or memory usage.
D : mpstat is a Linux command that displays information about the CPU utilization by each processor or core. It does not show information about processes or memory usage.
Reference:
top(1) - Linux manual page
vmstat(8) - Linux manual page
cptop - Check Point Software
mpstat(1) - Linux manual page